@article{Zhang2007,
author = {Zhang, Z. and Gao, W. and Hou, H. },
title= {Urban- rural divide，regional segmentation and insufficient access of migrants to social security entitlements: evidence from Shanghai and other four Chinese cities},
year = {2007},
journal = {Chinese Journal of Population Science},
volume = {6},
pages = {33−41 (in Chinese)},
}